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Author SHA1 Message Date
Alex Lam S.L
33b5f31984 v2.8.6 v2.8.6 2017-03-05 15:48:28 +08:00
Alex Lam S.L
35a849dc48 collapse assignment with adjacent subsequent usage (#1553) 
- consolidate `cascade` optimisations
- support ++/-- postfixes
- remove redundant optimisation identified in #1460

fixes #368
 2017-03-05 14:56:14 +08:00
Alex Lam S.L
b70591be1a handle variable declaration within catch blocks (#1546) 
accounts for IE8- scoping
 2017-03-05 13:13:44 +08:00
Alex Lam S.L
b33e7f88e6 improve unsafe on undefined (#1548) 
`unsafe` turns undefined keyword into a variable of the same name if found, but that interferes with other related optimisations.

Keep track of such transformations to ensure zero information loss in the process.
 2017-03-05 13:09:27 +08:00
Alex Lam S.L
1f0333e9f1 stay safe with constants in IE8- (#1547) 
- `undefined` etc. can be redefined at top-level for IE8-, so disable related optimisations
- fixed `--support-ie8` catch mangle bug
 2017-03-05 12:51:11 +08:00
Alex Lam S.L
eb98a7f2f3 fix handling of shebang and preamble (#1545) 
fixes #1332
 2017-03-05 12:16:02 +08:00
Alex Lam S.L
78d1bb92d4 fix a corner case in #1530 (#1552) 2017-03-05 12:12:59 +08:00
Alex Lam S.L
ea9ab9fb0e resolve issue with outdated version of async (#1549) 
fixes #746
 2017-03-05 01:54:20 +08:00
kzc
ce54c9ccee disallow collapse_vars constant replacement in for-in statements (#1543) 2017-03-04 02:39:54 +08:00
Alex Lam S.L
07accd2fbb process code with implicit return statement (#1522) 
Bookmarklet for instance implicitedly assumes a "completion value" without using `return`.
The `expression` option now supports such use cases.
Optimisations on IIFEs also enhanced.

fixes #354
fixes #543
fixes #625
fixes #628
fixes #640
closes #1293
 2017-03-03 18:13:07 +08:00
Alex Lam S.L
18059cc94f compress numerical expressions (#1513) 
safe operations
- `a === b` => `a == b`
- `a + -b`  => `a - b`
- `-a + b`  => `b - a`
- `a+ +b`   => `+b+a`

associative operations
(bit-wise operations are safe, otherwise `unsafe_math`)
- `a + (b + c)`       => `(a + b) + c`
- `(n + 2) + 3`       => `5 + n`
- `(2 * n) * 3`       => `6 * n`
- `(a | 1) | (2 | d)` => `(3 | a) | b`

fixes #412
 2017-03-03 18:04:32 +08:00
Alex Lam S.L
c8e61448cb Merge pull request #1541 from alexlamsl/harmony-v2.8.5 
Merging from master for 2.8.5
harmony-v2.8.5 		2017-03-03 07:30:28 +08:00
alexlamsl
f704e9b65c fix destructing crash in reduce_vars 
fixes #1531
 2017-03-03 07:23:46 +08:00
alexlamsl
0b77d861a8 Merge branch 'master' into harmony-v2.8.5 2017-03-03 07:17:52 +08:00
Alex Lam S.L
b5e0e8c203 facilitate fix for #1531 (#1542) 2017-03-03 07:12:24 +08:00
Alex Lam S.L
e5cb9275df v2.8.5 v2.8.5 2017-03-03 05:14:21 +08:00
Alex Lam S.L
17b81350d4 fix chained assignment with unused (#1540) 
When #1450 optimises `a=b=42`, it stops after the first variable even if both are unused.

fixes #1539
 2017-03-03 04:45:20 +08:00
kzc
4d63d4f5b3 collapse_vars should not replace constant in for-in init section (#1538) 
fixes #1537
 2017-03-03 03:51:15 +08:00
Alex Lam S.L
70d72ad806 properly cover all cases of for-in loop variables (#1536) 2017-03-03 02:39:57 +08:00
Alex Lam S.L
fe9227a41b fix reference marking in for-in loops (#1535) 
fixes #1533
 2017-03-03 00:56:06 +08:00
Alex Lam S.L
b49e142a26 disable do{...}while(false) optimisation (#1534) 
- fails to handle `break` in body

fixes #1532
 2017-03-03 00:54:41 +08:00
kzc
ee3b39b909 optimize trivial IIFEs returning constants (#1530) 2017-03-02 15:11:40 +08:00
Alex Lam S.L
9699ffb1af trim unused invocation parameters (#1526) 2017-03-02 11:33:59 +08:00
Alex Lam S.L
fdc9b9413b minor improvement to string optimisation (#1514) 
- "" + "a"     => "a"
- "" + a + "b" => a + "b"
- "a" + ""     => "a" (improving on #45)
 2017-03-02 11:31:39 +08:00
Alex Lam S.L
e27dab7e7c Merge pull request #1528 from alexlamsl/harmony-v2.8.4 
Merging from master for 2.8.4
harmony-v2.8.4 		2017-03-02 11:22:06 +08:00
alexlamsl
80f3ad3ce0 Merge branch 'master' into harmony-v2.8.4 2017-03-02 11:16:55 +08:00
Alex Lam S.L
40ceddb48a v2.8.4 v2.8.4 2017-03-02 00:24:49 +08:00
Alex Lam S.L
7aa69117e1 fix corner cases in reduce_vars (#1524) 
Avoid variable substitution in the following cases:
- use of variable before declaration
- declaration within conditional code blocks
- declaration within loop body

fixes #1518
fixes #1525
 2017-03-02 00:20:53 +08:00
Alex Lam S.L
bff7ad67bb v2.8.3 v2.8.3 2017-03-01 15:28:46 +08:00
Alex Lam S.L
c2334baa48 fix crash on missing props to string_template() (#1523) 
Patched up `make_node()` without `orig`.

There may be other cases where `start` could be missing, so make it print "undefined" instead of crashing.

fixes #1518
 2017-03-01 15:25:26 +08:00
Alex Lam S.L
22f7af205d Merge pull request #1521 from alexlamsl/harmony-v2.8.2 
Merging from master for 2.8.2
harmony-v2.8.2 		2017-03-01 11:13:32 +08:00
alexlamsl
8a7a4749c7 Merge branch 'master' into harmony-v2.8.2 2017-03-01 11:06:33 +08:00
Alex Lam S.L
fb2b6c7c6f v2.8.2 v2.8.2 2017-03-01 04:46:12 +08:00
Alex Lam S.L
f5cbe19b75 invert reduce_vars tracking flag (#1519) 
Modules like webpack and grunt-contrib-uglify still uses `ast.transform(compressor)` before `Compressor.compress(ast)` was introduced.

Workaround this compatibility issue by deactivating `reduce_vars` in such case.

Also fix use case with omitted `options` when calling `Compressor()`.

fixes #1516
 2017-03-01 04:12:10 +08:00
Alex Lam S.L
b34fa11a13 fix evaluate on object getter & setter (#1515) 2017-03-01 02:03:47 +08:00
Alex Lam S.L
320984c5f5 v2.8.1 v2.8.1 2017-03-01 00:27:08 +08:00
Alex Lam S.L
4365a51237 temporarily disables reduce_vars (#1517) 
... as we investigate #1516
 2017-03-01 00:25:43 +08:00
Alex Lam S.L
514fc68f4f Merge pull request #1509 from alexlamsl/harmony-2.8.0 
Merging from master for 2.8.0
harmony-v2.8.0 		2017-02-28 23:14:25 +08:00
alexlamsl
478aaab469 fix parser test 
not sure if `start.pos` is correct, but oh well
 2017-02-28 14:08:31 +08:00
alexlamsl
ab217539e9 restore sourceMappingURL in test 2017-02-28 13:23:02 +08:00
alexlamsl
a942dc07c4 fix parser tests 
update exception messages
 2017-02-28 03:58:01 +08:00
kzc
a0eaff750d fix parsing of arrow function with bind 
fixes #1510
 2017-02-28 02:47:33 +08:00
alexlamsl
57777b6cfa Merge branch 'master' into harmony-2.8.0 2017-02-28 02:28:58 +08:00
Alex Lam S.L
858e6c78a4 warn & drop #__PURE__ iff IIFE is dropped (#1511) 
- consolidate `side-effects` optimisations
- improve string `+` optimisation
- enhance literal & `conditionals` optimisations
 2017-02-28 02:25:44 +08:00
kzc
8d205f7f39 fix parser handling of comments 2017-02-27 14:54:47 +08:00
alexlamsl
bc9bfd15a2 fix test 2017-02-27 11:39:48 +08:00
alexlamsl
9fc1c4b3b5 update test 
top-level block-variables not within blocks are global variables
 2017-02-27 06:23:12 +08:00
alexlamsl
c59bf5e8d8 fix SymbolDef.global 
properly compute for top-level block-variables
 2017-02-27 06:20:08 +08:00
alexlamsl
d2d3a6e065 fix double-descend() 
for `AST_Export` in `AST_Toplevel.figure_out_scope()`
 2017-02-27 06:06:09 +08:00
alexlamsl
7755733716 fix "Starting destructuring." 
commit 32f76f7ff does not take into account `AST_SymbolFunarg` is also `AST_SymbolVar`, so don't need to call `AST_Scope.def_variable()` twice
 2017-02-27 05:30:18 +08:00